Fuel burner



July 10, 1934.

E. G. BAILEY FUEL BURNER Filed July 30, 1930 3 Sheets-Sheet 1 FIG. 2.

FIG].

July 10, 1934 E. e. BAILEY FUEL 'BURNER Filed July so, 1930 3 Sheets-Sheet 2 E. G. BAILEY 1,966,195

FUEL BURNER Filed July 30 1950 s Sheets-Sheet 5 July 10, 1934.

FIGS,

INVE T BY 5" ,J/yuu AT ORNEY;

llirll Patented Juiy it 1334- Parent sets FUEL BURNER Bailey, Easton, Pa, assignor to Fuller Lehigh Company, Fullerton, Pa, a corporation of Delaware Application July 30, 1930, Serial No. 471,674

2 Claims.

This invention relates to fuel burners that are especially useful for burning powdered fuel such as coal, but it is not restricted to this particular use.

A plurality of burners may be used and each one is provided with a narrow exit into the furn so to project the fuel in a thin sheet and is located so that th plane of the burner exit is at an angle to the horizontal. The burners can be applied to a furnace having water cooling tubes in the walls thereof, and extends across a plurality of tubes.

The invention will be understood from the description in connection with the accompanying drawings in which Fig. 1 is a vertical section through the furnace showing an illustrative embodiment of the invention; 2 is a vertical section along the line 2--2 of Fig. 1; Fig. 3 is a horizontal section along the line 3-3 of Fig. 1; Fig. 1 is in part a side elevation and in part a vertical section along the line 41 of Fig. 3 and Fig. 5 is a vertical section on an enlarged scale through one of the burners and the adjacent wall of the furnace.

In th drawings reference character 1 indicates a boile furnace is provided with water tubes 2 extending upwardly along the walls of the furnace. lower ends of the tubes 2 are connected to lower horizontal headers 3 and the upper ends of these tubes extend outwardly into horizontally disposed l. The tubes 2 are lined with tile 5, or the well-known Bailey blocks, to form continuous walls. The headers 3 and 4: may be connected by means of re-circulating tubes 6 outside of the furnace.

The floor 7 of the furnace, that may be made of refractory material, is supported upon the cross supports 8 molten slag from the products of combustion may collect upon the floor 7, as indicated at 9, and is drawn out through the slag tap openin is intervals. The walls of the furnace extend upwardly from the floor '2.

A water tube boiler may be located above the furnace 1, only lower row 11 of the inclined bank of tub-es or he boiler being indicated on Fig. 1 of the drawings. The headers 3 and 1 may be connected to the water circulation system of the boiler in the usual way.

A plurality of fuel burners 15 is provided along one wall of the furnace and a plurality of fuel burner" 18 is provided along the opposite wall of the furnace to project fuel and primary air into the furnace, the secondary air being furnished through the secondary air boxes 17,

(Cl. lid-28) through which the fuel burners 15 and 16 extend.

The fuel burners 15 and 16 are alike and one of them is shown in section on an enlarged scale in Fig. 5 and will now be described.

Th ordinary tile or blocks 5 that line the tubes 2 of the furnace are removed at the places where the burners 15 and 16 are installed. Special tile 1 blocks 5 are installed in these places leaving inclined openings for the burners. Each fuel burner comprises a fan-shaped conduit, or inlet, 18 that widens out toward the exit end so that the mouth, or exit thereof, terminates in the equivalent of a narrow slit 19. A row of blocks 20 have their sides that are toward the exit 19 V-shaped so that the stream of air and fuel will be divided by this row of blocks into two diverging sheets. The blocks of refractory material 20 are kept in place on the tubes 2 by means of the U-boits 21. They extend approximately along the middle line of the inclined opening between the rows of special tile or blocks 5.

The spaces 22 between the tubes 2, above and below the mouth 19 of the burner, may be regulated by means of the dampers 23 that are operated by the levers 24. An ignitor 25 for the fuel extends through the air box 17 and terminates near the end of the burner.

The burners 15 on one side of the furnace are mounted with their narrow exit ends inclined to the horizontal, or at an angle to the lateral extent of the wall each one extendin across several tubes in the furnace wall, all the burners on one wall having their exits parallel, as most clearly indicated in Fig. 2. Thus each burner projects through a wall at an angle to the plane of the floor, and, as will be seen in Fig. 5, the lon gitudinal axis of the burner also lies at an angle to the plane of the wall and the plane of the floor. Corresponding burners are provided along the opposite wall of the furnace with their exits inclined in the opposite direction. By inclining the burners, as described, they can be located at substantially the same elevation and a larger area of burner port openings and air port openings can be provided in a given horizontal distance than would be possible if the burners have their openings horizontal and at the same level. By this arrangement the burners do not overlap and all of them can be placed at the same distance from the refractory floor of the furnace. Also by having the burners in opposite walls and inclined in opposite directions, that is to say, each burner projecting through a wall at an angle to a burner in the opposite wall, an excellent interference of flame and gases is provided inside the furnace where they impinge against each other, thus causing better mixing and turbulence of the fuel and air and giving better combustion efficiency. It will be realized that the elongated opening of each burner lies at an angle to the elongated opening of a burner in the opposite wall, thus producing the effects which have just been described.

I claim:

1. In a furnace having a substantially vertical side wall, a pair of separate closely spaced elongated fuel burner ports formed in said wall, each of said ports being arranged with its longitudinal center line forming an oblique angle with the horizontal and corresponding portions of said ports being arranged at similar elevations in said wall, and means for discharging substantially parallel elongated streams of fuel through said 'ports. 

